1. Remove the negative lead from the battery for 30 seconds. While you're there, clean up all the battery, starter & alternator wires with a wire brush & sandpaper till they're nice & shiny. Also check the earth connections to the side of the block, especially the braided line from the block to the coil bracket!
2. Take the wheel off, then loosen the 2 strut->hub bolts. Shove the top & pull the bottom, see if that sorts the camber. If it does, it looks like its just clipped the kerb and a front wheel alignment will fix it, if not then something is bent, or perhaps the ball joint has been shoved along the wishbone.
3. I believe adjustment is at the handbrake lever end, there are 2 locknuts which attach to the lever, try adjusting the cable so that each wheel just binds when the lever is on 3 clicks. Best get a Haynes manual to double check the proper procedure though!
4. You can get MK3 armour door plates, which fit behind the handle and prevent damage of this kind. They're also hady for covering up previous damage, just sort any rust before you fit em

MK2 ones wont fit though!